Narrow/Low Fret Wire for Mandolin, Banjo, Ukelele, Dulcimer & more - Six Feet Six feet of beautiful, durable 18% nickel-silver fret wire Great for mandolins, banjos, dulcimers, ukeleles, cigar box guitars & more Six feet is more than enough for any smaller stringed instrument 8-inch straight lengths for ease of install. Great for new building or repair work! Size Specs: Crown Width: .053" (1.35mm), Crown Height: .037" (.94mm), Tang Depth: .054" (1.37mm). Recommended Slot Width: .023"